allow whitespace following EOL continuation backslash
In a few programming languages, the displayed or printed program can hide
critical syntactic and/or semantic information. For example, in make(1)
and Python, the difference between initial tabs and spaces can cause bugs
that are not visually apparent.
Ruby has a minor instance of this problem, in that spaces or tabs
between a backslash and the EOL will prevent the line from being continued:
?> = 2
SyntaxError: compile error
(irb):3: syntax error, unexpected $undefined, expecting $end
Could Ruby open up its syntax to allow any number of intervening spaces or tabs before the EOL?